Guide the aircraft's nose gear onto the exact center of a parking stand.
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The , primarily published by the Airports Council International (ACI) , is the global authority on standardizing the visual aids used in aircraft parking areas.
: Promote common standards across different airport operators to reduce confusion for pilots and ground crews.
Indicate a requirement to stop. These are placed where the apron connects to a taxiway or runway holding position. Information and Location Signs
| Marking Type | Minimum Line Width | Paint Type | Retroreflectivity (mcd/lux/m²) | | :--- | :--- | :--- | :--- | | Lead-In Line | 15 cm (6 in) | Waterborne epoxy | 150 (white) | | Stop Bar | 30 cm (12 in) | Thermoplastic (preformed) | 200 (white) | | Vehicle Walkway | 10 cm (4 in) | Solvent-based acrylic | 100 (yellow) |
Signs on the apron provide situational awareness, route verification, and critical warnings. They are categorized by color and function. Mandatory Instruction Signs White lettering on a red background.
: A marking that uniquely identifies the parking position, enabling clear communication between controllers, pilots, and ground personnel.